Got my 5600ES into play and am struggling a bit with the simultaneous HDMI out.
Seems to work ok for DVD and AppleTV/Netflix, aside from the noticeable switching as the second Sony TV comes on/off line.
Not so when the source is a Motorola DCT 6412 III on Shaw Cable (Vancouver BC). It seems that it can't get into sync and switches continuously.
I'm wondering if the output resolution or power of the Motorola is insufficient or if have missed something configuration. I'm not a total newbie but at the same time no expert, just a geek that likes his toys

Actual installation went pretty good as I was replacing on older Sony AV Amp. My main reason for upgrading was the simultaneous HDMI out so that I could feed an adjoining room easier.
The Win7 setup software doesn't run after an initial run but that's ok setup via GUI or the amp itself is pretty good/easy.
Any help/suggestions re the cable box will be much appreciated.
Thanks in advance
Edit: After more searching re DCT 6412 III I found that it is a common problem. I'll be re-configuring to use Component Input. Was debating wether to just delete this post but maybe there are others following that can rest easier that it's not a problem with the receiver.
Edit2: Problem with upscaling is that automatic screen adjustments between 4:3 and 16:9 are lost. Not very cool to look at stretched 4:3. I could never understand what the designers were thinking.
Anyways, I ended up feeding the Component from the CableBox to my second set and HDMI to the 5600ES. Not as convenient as I had hoped for but workable until a smarter/normal CableBox is offered. Open to alternative suggestions
